samba: fix dependencies and QA issues

Fix remaining QA issues (dependency-wise) like

  WARNING: QA Issue: samba rdepends on libacl, but it isn't a build dependency? [build-deps]
  WARNING: QA Issue: samba rdepends on libavahi-client, but it isn't a build dependency? [build-deps]

broken perl library path, having a default PACKAGECONFIG, but allow
user-defined one and rely on PACKAGECONFIG instead of DISTRO_FEATURES.

Signed-off-by: Jens Rehsack <sno@netbsd.org>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>